Bikini Warriors itself had a ton of problems. The fan service was half baked and often took away from the show itself. The show being primarily a parody of RPG tropes.

So before even going into this you don't feel attachment to the characters. They are just generic anime girls. I understand the appeal of liking a character and then wanted to see them be more sexual with one another. Freezing has a set of specials that are more or less softcore porn as well. I cared about the characters in Freezing though. So it was a neat concept to see them hyper sexual.

This is not
like that that. Bikini Warriors character are generic anime girls. You can watch any other hyper sexual fan service anime and get the same or better experience. I recommend just forgoing this and watching hentai. The sexual stuff isn't good and the parody stuff is non-existent.

There's not much I can about a special that's only around 4 minutes long. You have the same characters that you either liked or disliked from the original series. The same bikini armor is back. Now, you get to see girls taking of each other's clothes due to be entranced by a spell. Just like the series, this special delivers the same type of ecchi and other stuff that you would likely expect. There's not really anything left to say so, if you liked the series, watch this. 8/10 it is since I find this to be just as funny
during a re-watch. After you watch it, you'll probably be satisfied if you knew what to expect.

This is a bonus episode of the BD release of Bikini Warriors. As such, it is rather... different than the normal episodes.

Bikini Warriors is normally made up of two things: Fanservice and RPG parody. But this episode does away with the latter, but does ramp up the former to ludicrous (moreso than BW usually does) levels. Not only does it finally shows nipples, it generally goes as far as it could, without becoming outright hentai. As in, it shows pretty graphic girl-on-girl sex, just short of outright showing genitals.

And that's it, basically. There are no RPG tropes parodied and it's generally lacking in jokes, missing
a crucial aspect of the series itself.

With the right expectations, this bonus episode can be rather enjoyable. Despite having the same length as a normal episode, it should be rather seen a a little bonus. But if you expect something more like the regular series, you're in for disappointment.